Power-jack.



H. G. HANS EN. V 7 POWER JACK. APPLIUATION FILED Jun}: 29, 1907.

Patented Dec. 1, 1908,

2 SHEETS-SHEET 1.

" Mirzeases;

1L0. HANSEN. POWER JACK. APPLICATION FILED JUNE 29, 1907.'

mffiees. I Pg 8' Im/enfir:

Patented Dec, 1, 1908.

,2 SHEEN-SHEET 2.

HENRY. O. HANSEN OF OAK HARBOR, OHIO.

POWER-JACK.

Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed. June 29, 1907. Serial No. 381,413.

To all whom it may concern:

Be it known that I, HENRY C. HANSEN,

a citizen of the United States, residing at Oak Harbor, in the county ofOttawa and State of Ohio, have invented certain new and usefulImprovements in Power-Jacks and I do declare the following to be a full,clear,

and exact description of the invention, suchas will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters andfigures of reference marked thereon, which form a part of thisspecification.

My invention relates to a power-jack such as may be employed for avariety of purposes such, for instance, as the tightening of largebelts, the moving ofheavy bodies and securing in place heavy loads.

My invention is designed to furnish a device of the character describedwhich shall be cheap, light, strong, and useful for a great variety ofpurposes. I attain these objects by means of the devices and arrangementof parts hereinafter described and shown, and illustrated in theaccompanying drawings,-in which,

Figure 1 1s a top-plan view of my device;

Fig. 2, a side-elevation of the same; Fig. 3, a side-elevation of thehand-lever hereinafter referred to; Fig. 4, a top-plan view of the same;Fig. 5, an end-view of the same with the handle in transverse sectionFig. 6, a

top-plan view of the supplemental chainwheel and its housing hereinafterreferred to, on an enlarged scale; Fig. 7 ,aside-elevation of the same,and Fig. 8, a central transverse sectional elevation of the chain-wheelshereinafter referred to.

In the drawings,in which like numerals of reference indicate like parts,1 is a housing composed of two like castings secured together at theiropposite ends by bolts 3 and 4. A single integral casting forms a pairof ratchet-wheels 5 separated centrally by av chain-wheel 6. The castinghas at opposite sides hubs 7 which fit loosely in openings'in the sidesof the housing, the openings being surrounded and reinforced by bosses8. Through the ratchet-wheels, the chainwheels, and the hubs is an axialopening 9 angular in transverse section. Through this opening may bepassed a shaft 10 of corresponding angular cross-section the purpose ofwhich will presently be described.

11 is a hand-lever having at its upper end a handle 12 and having at itsother end, formed integral therewith and at a rightangle thereto, ashaft 13 having its hearings in openings in the sides of the housingsreinforced by bosses 14. Formed integral with the lever 11 and the shaft13 are two circular lugs 15 disposed at opposite sides of the lever andeccentric to the axis of the shaft 13. The throw of these two eccentricsis diametrically opposite to each other. Mounted and journaled upon thetwo eccentrics 15 are pawls 16 the points of which are in alinement withand engage the teeth of the ratchet-wheels 5. It will be seen that whenthe lever 11 is swung upon its bearings in one direction one of thepawls will drive its ratchet-wheel forward while the other pawl retreatsand that when the. lever is swung in the opposite direction the movementof the pawls is reversed so that w th each swing of the lever in eitherdirection the ratchet-wheels are advanced a step. Secured to the housingat the end opposite the ratchet-wheels is a link 17 adapted forengagement with a chain, rope, or the like. The chain-wheel 6 is adaptedto receive the links of a suitable chain which is passed around thewheel from the under side and forward over the end of the housing 1.Upon the inner side 'of the housing at its forward end-is a cast-offblock 18 which, as the chain is paidwff from the chain-wheel. catchesthe links successively and disengages them from the teeth of thechain-wheel.

The operation of my device, thus far described, is as follows: Assumingfor illustration that the device is to be used for moving a heavyload,the link 17 is anchored to an immovable object, a chain is securedto the object to be moved and passed under and over the chain-wheel 6.Now the swing to and fro of the lever 11 will, by the alternate actionof the pawls 16, slowly and powerfully turn the ratchet-wheels and thechainwheel and draw the load toward the anchor. As the successive linkscome in contact with the cast-off block 18 they are forced out ofengagement with the teeth of the chainwheel. To slacken the chain sothat the jack may be disengaged from its load, the pawls are alternatelylifted manually as they retreat from the teeth of their respectiveratchet-wheels and held against engagement with the ratchet-wheel asthey advance, thus permitting the ratchet-wheels to move backward stepby step until the chain is sulficiently slackened to ment from its load.

19 is another housing practically identical with the housing 1 exceptthat it has no provision for the ournaling of the shaft 10 and isnarrower for the reason that the sprocketwheels are, in this instance,omitted. This housing is composed of two like parts secured together attheir opposite ends by suitable bolts.

20 is a chain-wheel corresponding in number of teeth and diameter withthe chainwheel above described and having at opposite sides hubs 21which fit loosely in the sides of the housings, the openings beingsurrounded and reinforced by bosses 22. Secured to the housing 19 is alink 3 adapted for engagement with a chain, rope, or the like. Upon theinner side of the housing 19 at its forward end is a cast-off block 24which, as the chain is paid oif from the chain-wheel, catches the linkssuccessively and disengages them from the teeth of the chain-wheel.

Through the center of the cl'iain-wheel 20, transversely, is a hole 25corresponding with the angular hole 9 through the-chain-wheel 6 and inaxial alinement therewith. Through the holes in the two chain-wheels maybe passed a shaft corresponding in cross-section with the angular holes9-25. The two housings with their attachments may he slipped along theshaft any desired distance asunder. When the shaft 10 is rotated bymeans of the lever, pawls, and ratchets mounted in housing 1, the twochain-wheels must rotate in unison and the chains having correspondinglinks engaged with such chain-wheels, must be caused to move uniformly.

A further application of my invention is illustrated in tightening orbringing together the ends of a broad heavy belt. The two housings withtheir attachments being placed upon the same shaft are placed a suitabledistance apart. The links 16 and 523 permit its dlsengageare secured bythe usual clamping device to one end of the belt and the chains arepassed around the chain-wheels 6 and 20 as above described and in likemanner connected with the opposite end of the belt. Now by the swing ofthe lever 11 to and fro the two ends of the belt are drawn powerfullytogether so that they may be laced or otherwise secured together.

Having described by invention, what I claim and desire to secure byLetters Patent is,

1. In a device of the described character, a housing, a shaft journaledin the housing, a pair of eccentrics on the shaft, a lever connectedwith the shaft, a pair of oppositely reciprocating pawls mounted andjournaled upon the eccentrics, a pair of ratchet-wheels in operativerelation to the pawls, a chainwheel between the ratchetwheels, saidratchet-wheels being formed integral and having axially therethrough anopening angular in transverse area, and a shaft in said opening uponwhich the housing may be moved transversely.

2. In a. device of the described character, a pair of housings, achain-wheel in each of said housings, a pair of ratchet-wheels connectedwith one of said chain-wheels, a shaft upon which the two housings thechainwheels and the ratchet-wheels are slidably mounted in rotativeengagement, in one of said housings a shaft journaled in the housing, apair of eccentrics on the shaft, a lever connected with the shaft, and apair of oppositely reciprocating pawls mounted and journaled upon theeccentrics and disposed in operative relation to said pair ofratchetwheels.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY C. HANSEN. Witnesses TV. ZDIMERMAN, EMERY 'lmnmvnournn.

